package com.ssj.ssj.config;

import com.ssj.ssj.modules.security.filter.CorsFilter;
import com.ssj.ssj.modules.security.filter.JwtAuthenticationTokenFilter;
import com.ssj.ssj.modules.security.handle.AuthenticationEntryPointImpl;
import com.ssj.ssj.modules.security.handle.LogoutSuccessHandlerImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutFilter;

/**
 * @author Tiandy
 */
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {
  /**
   * 自定义用户认证逻辑
   */
  @Autowired
  private UserDetailsService userDetailsService;

  /**
   * 认证失败处理类
   */
  @Autowired
  private AuthenticationEntryPointImpl unauthorizedHandler;

  /**
   * 退出处理类
   */
  @Autowired
  private LogoutSuccessHandlerImpl logoutSuccessHandler;

  /**
   * token认证过滤器
   */
  @Autowired
  private JwtAuthenticationTokenFilter authenticationTokenFilter;

  /**
   * 跨域过滤器
   */
  @Autowired
  private CorsFilter corsFilter;

  /**
   * 解决 无法直接注入 AuthenticationManager
   *
   * @return
   * @throws Exception
   */
  @Bean
  @Override
  public AuthenticationManager authenticationManagerBean() throws Exception {
    return super.authenticationManagerBean();
  }

  @Override
  protected void configure(HttpSecurity httpSecurity) throws Exception
  {
    // 注解标记允许匿名访问的url
    //ExpressionUrlAuthorizationConfigurer<HttpSecurity>.ExpressionInterceptUrlRegistry registry = httpSecurity.authorizeRequests();
    //permitAllUrl.getUrls().forEach(url -> registry.antMatchers(url).permitAll());

    httpSecurity
        // CSRF禁用，因为不使用session
        .csrf().disable()
        // 认证失败处理类
        .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
        // 基于token，所以不需要session
        .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
        // 过滤请求
        .authorizeRequests()
        // 对于登录login 注册register 验证码captchaImage 允许匿名访问
        .antMatchers("/login",  "/captcha").anonymous()
        // 静态资源，可匿名访问
        .antMatchers(HttpMethod.GET, "/", "/*.html", "/**/*.html", "/**/*.css", "/**/*.js").permitAll()
        .antMatchers("/swagger-ui.html", "/swagger-resources/**", "/webjars/**", "/*/api-docs").permitAll()
        // 除上面外的所有请求全部需要鉴权认证
        .anyRequest().authenticated()
        .and()
        .headers().frameOptions().disable();
    // 添加Logout filter
    httpSecurity.logout().logoutUrl("/logout").logoutSuccessHandler(logoutSuccessHandler);
    // 添加JWT filter
    httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
    // 添加CORS filter
    httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class);
    httpSecurity.addFilterBefore(corsFilter, LogoutFilter.class);
  }

  /**
   * 强散列哈希加密实现
   */
  @Bean
  public BCryptPasswordEncoder bCryptPasswordEncoder() {
    return new BCryptPasswordEncoder();
  }

  /**
   * 身份认证接口
   */
  @Override
  protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder());
  }
}
